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/* |
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* Copyright (c) 2012 Clément Bœsch |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* JACOsub subtitle decoder |
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* @see http://unicorn.us.com/jacosub/jscripts.html |
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*/ |
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#include <time.h> |
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#include "ass.h" |
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#include "jacosub.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/bprint.h" |
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#include "libavutil/time_internal.h" |
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#undef time |
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35 |
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36 |
13 |
static int insert_text(AVBPrint *dst, const char *in, const char *arg) |
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{ |
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38 |
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av_bprintf(dst, "%s", arg); |
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39 |
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return 0; |
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} |
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static int insert_datetime(AVBPrint *dst, const char *in, const char *arg) |
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{ |
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char buf[16] = {0}; |
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time_t now = time(0); |
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struct tm ltime; |
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localtime_r(&now, <ime); |
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if (strftime(buf, sizeof(buf), arg, <ime)) |
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av_bprintf(dst, "%s", buf); |
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return 0; |
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} |
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53 |
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static int insert_color(AVBPrint *dst, const char *in, const char *arg) |
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{ |
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return 1; // skip id |
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} |
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58 |
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static int insert_font(AVBPrint *dst, const char *in, const char *arg) |
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{ |
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return 1; // skip id |
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} |
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63 |
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static const struct { |
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const char *from; |
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const char *arg; |
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int (*func)(AVBPrint *dst, const char *in, const char *arg); |
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68 |
} ass_codes_map[] = { |
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{"\\~", "~", insert_text}, // tilde doesn't need escaping |
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{"~", "{\\h}", insert_text}, // hard space |
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{"\\n", "\\N", insert_text}, // newline |
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{"\\D", "%d %b %Y", insert_datetime}, // current date |
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{"\\T", "%H:%M", insert_datetime}, // current time |
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{"\\N", "{\\r}", insert_text}, // reset to default style |
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{"\\I", "{\\i1}", insert_text}, // italic on |
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{"\\i", "{\\i0}", insert_text}, // italic off |
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{"\\B", "{\\b1}", insert_text}, // bold on |
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{"\\b", "{\\b0}", insert_text}, // bold off |
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{"\\U", "{\\u1}", insert_text}, // underline on |
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{"\\u", "{\\u0}", insert_text}, // underline off |
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{"\\C", "", insert_color}, // TODO: color |
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{"\\F", "", insert_font}, // TODO: font |
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}; |
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84 |
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enum { |
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ALIGN_VB = 1<<0, // vertical bottom, default |
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ALIGN_VM = 1<<1, // vertical middle |
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ALIGN_VT = 1<<2, // vertical top |
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ALIGN_JC = 1<<3, // justify center, default |
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ALIGN_JL = 1<<4, // justify left |
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ALIGN_JR = 1<<5, // justify right |
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}; |
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93 |
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94 |
11 |
static void jacosub_to_ass(AVCodecContext *avctx, AVBPrint *dst, const char *src) |
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{ |
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96 |
11 |
int i, valign = 0, halign = 0; |
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97 |
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char c = av_toupper(*src); |
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98 |
11 |
char directives[128] = {0}; |
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99 |
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/* extract the optional directives */ |
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✓✗✗✓ ✗✗ |
11 |
if ((c >= 'A' && c <= 'Z') || c == '[') { |
102 |
11 |
char *p = directives; |
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103 |
11 |
char *pend = directives + sizeof(directives) - 1; |
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104 |
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105 |
23 |
do *p++ = av_toupper(*src++); |
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✓✗✓✓ ✓✗ |
23 |
while (*src && !jss_whitespace(*src) && p < pend); |
107 |
11 |
*p = 0; |
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108 |
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src = jss_skip_whitespace(src); |
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} |
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110 |
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/* handle directives (TODO: handle more of them, and more reliably) */ |
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✓✓ | 11 |
if (strstr(directives, "VB")) valign = ALIGN_VB; |
113 |
✓✓ | 10 |
else if (strstr(directives, "VM")) valign = ALIGN_VM; |
114 |
✓✓ | 6 |
else if (strstr(directives, "VT")) valign = ALIGN_VT; |
115 |
✓✓ | 11 |
if (strstr(directives, "JC")) halign = ALIGN_JC; |
116 |
✓✓ | 10 |
else if (strstr(directives, "JL")) halign = ALIGN_JL; |
117 |
✓✓ | 9 |
else if (strstr(directives, "JR")) halign = ALIGN_JR; |
118 |
✓✓✓✓ |
11 |
if (valign || halign) { |
119 |
✓✓ | 9 |
if (!valign) valign = ALIGN_VB; |
120 |
✓✓ | 9 |
if (!halign) halign = ALIGN_JC; |
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✓✓✓✗ ✓✗✗✓ ✗✗ |
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switch (valign | halign) { |
122 |
1 |
case ALIGN_VB | ALIGN_JL: av_bprintf(dst, "{\\an1}"); break; // bottom left |
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123 |
2 |
case ALIGN_VB | ALIGN_JC: av_bprintf(dst, "{\\an2}"); break; // bottom center |
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124 |
1 |
case ALIGN_VB | ALIGN_JR: av_bprintf(dst, "{\\an3}"); break; // bottom right |
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case ALIGN_VM | ALIGN_JL: av_bprintf(dst, "{\\an4}"); break; // middle left |
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126 |
4 |
case ALIGN_VM | ALIGN_JC: av_bprintf(dst, "{\\an5}"); break; // middle center |
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127 |
case ALIGN_VM | ALIGN_JR: av_bprintf(dst, "{\\an6}"); break; // middle right |
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128 |
case ALIGN_VT | ALIGN_JL: av_bprintf(dst, "{\\an7}"); break; // top left |
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129 |
1 |
case ALIGN_VT | ALIGN_JC: av_bprintf(dst, "{\\an8}"); break; // top center |
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case ALIGN_VT | ALIGN_JR: av_bprintf(dst, "{\\an9}"); break; // top right |
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} |
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132 |
2 |
} |
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133 |
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/* process timed line */ |
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✓✗✓✓ |
586 |
while (*src && *src != '\n') { |
136 |
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/* text continue on the next line */ |
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138 |
✓✓✓✓ |
575 |
if (src[0] == '\\' && src[1] == '\n') { |
139 |
7 |
src += 2; |
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✓✓ | 183 |
while (jss_whitespace(*src)) |
141 |
176 |
src++; |
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142 |
7 |
continue; |
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} |
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144 |
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/* special character codes */ |
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146 |
✓✓ | 8380 |
for (i = 0; i < FF_ARRAY_ELEMS(ass_codes_map); i++) { |
147 |
7825 |
const char *from = ass_codes_map[i].from; |
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148 |
7825 |
const char *arg = ass_codes_map[i].arg; |
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149 |
7825 |
size_t codemap_len = strlen(from); |
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150 |
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✓✓ | 7825 |
if (!strncmp(src, from, codemap_len)) { |
152 |
13 |
src += codemap_len; |
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153 |
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src += ass_codes_map[i].func(dst, src, arg); |
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154 |
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break; |
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} |
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} |
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157 |
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/* simple char copy */ |
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159 |
✓✓ | 568 |
if (i == FF_ARRAY_ELEMS(ass_codes_map)) |
160 |
555 |
av_bprintf(dst, "%c", *src++); |
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} |
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162 |
11 |
} |
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163 |
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164 |
11 |
static int jacosub_decode_frame(AVCodecContext *avctx, |
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void *data, int *got_sub_ptr, AVPacket *avpkt) |
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{ |
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int ret; |
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168 |
11 |
AVSubtitle *sub = data; |
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169 |
11 |
const char *ptr = avpkt->data; |
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170 |
11 |
FFASSDecoderContext *s = avctx->priv_data; |
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171 |
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172 |
✗✓ | 11 |
if (avpkt->size <= 0) |
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goto end; |
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174 |
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175 |
✗✓ | 11 |
if (*ptr) { |
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AVBPrint buffer; |
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177 |
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// skip timers |
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179 |
11 |
ptr = jss_skip_whitespace(ptr); |
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180 |
✗✓ | 11 |
ptr = strchr(ptr, ' '); if (!ptr) goto end; ptr++; |
181 |
✗✓ | 11 |
ptr = strchr(ptr, ' '); if (!ptr) goto end; ptr++; |
182 |
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183 |
11 |
av_bprint_init(&buffer, JSS_MAX_LINESIZE, JSS_MAX_LINESIZE); |
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184 |
11 |
jacosub_to_ass(avctx, &buffer, ptr); |
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185 |
11 |
ret = ff_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL); |
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186 |
11 |
av_bprint_finalize(&buffer, NULL); |
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✗✓ | 11 |
if (ret < 0) |
188 |
return ret; |
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} |
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190 |
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end: |
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192 |
11 |
*got_sub_ptr = sub->num_rects > 0; |
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193 |
11 |
return avpkt->size; |
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194 |
} |
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195 |
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AVCodec ff_jacosub_decoder = { |
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.name = "jacosub", |
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198 |
.long_name = NULL_IF_CONFIG_SMALL("JACOsub subtitle"), |
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199 |
.type = AVMEDIA_TYPE_SUBTITLE, |
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200 |
.id = AV_CODEC_ID_JACOSUB, |
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201 |
.init = ff_ass_subtitle_header_default, |
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.decode = jacosub_decode_frame, |
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203 |
.flush = ff_ass_decoder_flush, |
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204 |
.priv_data_size = sizeof(FFASSDecoderContext), |
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}; |
Generated by: GCOVR (Version 4.2) |